tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1# This file is included by the global makefile so that you can add your own
2# architecture-specific flags and dependencies. Remember to do have actions
3# for "archclean" and "archdep" for cleaning up and making dependencies for
4# this architecture.
5#
6# This file is subject to the terms and conditions of the GNU General Public
7# License. See the file "COPYING" in the main directory of this archive
8# for more details.
9#
10# Copyright (C) 1994 by Linus Torvalds
11# Changes for PPC by Gary Thomas
12# Rewritten by Cort Dougan and Paul Mackerras
13#
14
15HAS_BIARCH := $(call cc-option-yn, -m32)
16
17# Set default 32 bits cross compilers for vdso and boot wrapper
18CROSS32_COMPILE ?=
19
20CROSS32CC := $(CROSS32_COMPILE)gcc
21CROSS32AR := $(CROSS32_COMPILE)ar
22
23ifeq ($(HAS_BIARCH),y)
24ifeq ($(CROSS32_COMPILE),)
25CROSS32CC := $(CC) -m32
26CROSS32AR := GNUTARGET=elf32-powerpc $(AR)
27endif
28endif
29
30export CROSS32CC CROSS32AR
31
32ifeq ($(CROSS_COMPILE),)
33KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
34else
35KBUILD_DEFCONFIG := ppc64_defconfig
36endif
37
38ifeq ($(CONFIG_PPC64),y)
39OLDARCH := ppc64
40
41new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
42
43ifeq ($(new_nm),y)
44NM := $(NM) --synthetic
45endif
46
47else
48OLDARCH := ppc
49endif
50
51# It seems there are times we use this Makefile without
52# including the config file, but this replicates the old behaviour
53ifeq ($(CONFIG_WORD_SIZE),)
54CONFIG_WORD_SIZE := 32
55endif
56
57UTS_MACHINE := $(OLDARCH)
58
59ifeq ($(HAS_BIARCH),y)
60override AS += -a$(CONFIG_WORD_SIZE)
61override LD += -m elf$(CONFIG_WORD_SIZE)ppc
62override CC += -m$(CONFIG_WORD_SIZE)
63override AR := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
64endif
65
66LDFLAGS_vmlinux-yy := -Bstatic
67LDFLAGS_vmlinux-$(CONFIG_PPC64)$(CONFIG_RELOCATABLE) := -pie
68LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-yy)
69
70CFLAGS-$(CONFIG_PPC64) := -mminimal-toc -mtraceback=none -mcall-aixdesc
71CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 -mmultiple
72KBUILD_CPPFLAGS += -Iarch/$(ARCH)
73KBUILD_AFLAGS += -Iarch/$(ARCH)
74KBUILD_CFLAGS += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
75CPP = $(CC) -E $(KBUILD_CFLAGS)
76
77CHECKFLAGS += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
78
79ifeq ($(CONFIG_PPC64),y)
80GCC_BROKEN_VEC := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
81
82ifeq ($(CONFIG_POWER4_ONLY),y)
83ifeq ($(CONFIG_ALTIVEC),y)
84ifeq ($(GCC_BROKEN_VEC),y)
85 KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
86else
87 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
88endif
89else
90 KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
91endif
92else
93 KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
94endif
95else
96LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
97endif
98
99ifeq ($(CONFIG_TUNE_CELL),y)
100 KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
101endif
102
103# No AltiVec instruction when building kernel
104KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
105
106# No SPE instruction when building kernel
107# (We use all available options to help semi-broken compilers)
108KBUILD_CFLAGS += $(call cc-option,-mno-spe)
109KBUILD_CFLAGS += $(call cc-option,-mspe=no)
110
111# Enable unit-at-a-time mode when possible. It shrinks the
112# kernel considerably.
113KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
114
115# Never use string load/store instructions as they are
116# often slow when they are implemented at all
117KBUILD_CFLAGS += -mno-string
118
119ifeq ($(CONFIG_6xx),y)
120KBUILD_CFLAGS += -mcpu=powerpc
121endif
122
123# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
124ifeq ($(CONFIG_FUNCTION_TRACER),y)
125KBUILD_CFLAGS += -mno-sched-epilog
126endif
127
128cpu-as-$(CONFIG_4xx) += -Wa,-m405
129cpu-as-$(CONFIG_6xx) += -Wa,-maltivec
130cpu-as-$(CONFIG_POWER4) += -Wa,-maltivec
131cpu-as-$(CONFIG_E500) += -Wa,-me500
132cpu-as-$(CONFIG_E200) += -Wa,-me200
133
134KBUILD_AFLAGS += $(cpu-as-y)
135KBUILD_CFLAGS += $(cpu-as-y)
136
137head-y := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
138head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o
139head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
140head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
141head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o
142
143head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
144head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
145
146core-y += arch/powerpc/kernel/ \
147 arch/powerpc/mm/ \
148 arch/powerpc/lib/ \
149 arch/powerpc/sysdev/ \
150 arch/powerpc/platforms/ \
151 arch/powerpc/math-emu/
152core-$(CONFIG_XMON) += arch/powerpc/xmon/
153core-$(CONFIG_KVM) += arch/powerpc/kvm/
154
155drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
156
157# Default to zImage, override when needed
158all: zImage
159
160CPPFLAGS_vmlinux.lds := -Upowerpc
161
162BOOT_TARGETS = zImage zImage.initrd uImage zImage% dtbImage% treeImage.% cuImage.% simpleImage.%
163
164PHONY += $(BOOT_TARGETS)
165
166boot := arch/$(ARCH)/boot
167
168$(BOOT_TARGETS): vmlinux
169 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
170
171bootwrapper_install %.dtb:
172 $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
173
174define archhelp
175 @echo '* zImage - Build default images selected by kernel config'
176 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
177 @echo ' uImage - U-Boot native image format'
178 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older'
179 @echo ' versions which do not support device trees'
180 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob'
181 @echo ' simpleImage.<dt> - Firmware independent image.'
182 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)'
183 @echo ' install - Install kernel using'
184 @echo ' (your) ~/bin/installkernel or'
185 @echo ' (distribution) /sbin/installkernel or'
186 @echo ' install to $$(INSTALL_PATH) and run lilo'
187 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
188 @echo ''
189 @echo ' Targets with <dt> embed a device tree blob inside the image'
190 @echo ' These targets support board with firmware that does not'
191 @echo ' support passing a device tree directly. Replace <dt> with the'
192 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
193 @echo ' (minus the .dts extension).'
194endef
195
196install:
197 $(Q)$(MAKE) $(build)=$(boot) install
198
199vdso_install:
200ifeq ($(CONFIG_PPC64),y)
201 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
202endif
203 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
204
205archclean:
206 $(Q)$(MAKE) $(clean)=$(boot)
207
208archprepare: checkbin
209
210# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
211# to stdout and these checks are run even on install targets.
212TOUT := .tmp_gas_check
213# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
214# instructions.
215# gcc-3.4 and binutils-2.14 are a fatal combination.
216
217checkbin:
218 @if test "$(call cc-version)" = "0304" ; then \
219 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
220 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
221 echo 'correctly with gcc-3.4 and your version of binutils.'; \
222 echo '*** Please upgrade your binutils or downgrade your gcc'; \
223 false; \
224 fi ; \
225 fi
226 @if test "$(call cc-fullversion)" = "040200" \
227 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
228 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
229 echo 'kernel with modules enabled.' ; \
230 echo -n '*** Please use a different GCC version or ' ; \
231 echo 'disable kernel modules' ; \
232 false ; \
233 fi
234 @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
235 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
236 echo 'correctly with old versions of binutils.' ; \
237 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
238 false ; \
239 fi
240
241CLEAN_FILES += $(TOUT)
242